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|
dnl check RAII requirements
dnl
dnl gcc / llvm-gcc: -fnested-functions
dnl clang : -fblocks / -fblocks and -lBlocksRuntime"
AC_DEFUN([AST_CHECK_RAII], [
AC_MSG_CHECKING([for RAII support])
AST_C_COMPILER_FAMILY=""
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([], [
int main() {
#if defined(__clang__)
choke
#endif
return 0;
}
])
],[
dnl Nested functions required for RAII implementation
AC_MSG_CHECKING(for gcc -fnested-functions)
AC_COMPILE_IFELSE(
dnl Prototype needed due to http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36774
[
AC_LANG_PROGRAM([], [auto void foo(void); void foo(void) {}])
],[
AST_NESTED_FUNCTIONS=""
AC_MSG_RESULT(no)
],[
AST_NESTED_FUNCTIONS="-fnested-functions"
AC_MSG_RESULT(yes)
]
)
AC_SUBST(AST_NESTED_FUNCTIONS)
AST_C_COMPILER_FAMILY="gcc"
],[
AC_MSG_CHECKING(for clang -fblocks)
if test "`echo 'int main(){return ^{return 42;}();}' | ${CC} -o /dev/null -fblocks -x c - 2>&1`" = ""; then
AST_CLANG_BLOCKS_LIBS=""
AST_CLANG_BLOCKS="-Wno-unknown-warning-option -fblocks"
AC_MSG_RESULT(yes)
elif test "`echo 'int main(){return ^{return 42;}();}' | ${CC} -o /dev/null -fblocks -x c -lBlocksRuntime - 2>&1`" = ""; then
AST_CLANG_BLOCKS_LIBS="-lBlocksRuntime"
AST_CLANG_BLOCKS="-fblocks"
AC_MSG_RESULT(yes)
else
AC_MSG_ERROR([BlocksRuntime is required for clang, please install libblocksruntime])
fi
AC_SUBST(AST_CLANG_BLOCKS_LIBS)
AC_SUBST(AST_CLANG_BLOCKS)
AST_C_COMPILER_FAMILY="clang"
]
)
if test -z "${AST_C_COMPILER_FAMILY}"; then
AC_MSG_ERROR([Compiler ${CC} not supported. Mminimum required gcc-4.3 / llvm-gcc-4.3 / clang-3.3 + libblocksruntime-dev])
fi
AC_SUBST(AST_C_COMPILER_FAMILY)
])
|
